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But in between,
from the 1950s to the 1980s,
most people used line printers.
These devices only allowed input and output of the letters, numbers, and punctuation found on a standard keyboard,
so programming languages and interfaces had to be designed around that constraint.

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@wking Good point! How about thisone. Its
CC BY 2.0 - we can add the attribution in the caption.

That sounds better. I'm not sure about mixing CC BY versions (2.0
vs. 4.0). The GPL suggests explit “or later” language for that sort
of thing, but the closest I can find in CC-land is BY-SA's §1.c (which
lists compatible licenses [1,2]). The CC FAQ has 3, and I expect we
could include the image with a caveat in LICENSE.md about the image
being CC BY 2.0, but I'm doubtful that we can unilaterally promote the
license to version 4.0.